The HP 250 G4 is a laptop using one of Intel's ultra low voltage CPUs, eg. the i3-4005u or the Atom based Celeron N3050. All ULV Intel chips are soldered onto their motherboards as they use a BGA socket and cannot be upgraded. Same with the Celeron N3050 or similar, it's soldered to the board, and can't be upgraded. If you need more performance, you will have to buy a new laptop..